The Boundary condition i specified has changed after computation

Nemish · March 31, 2016, 08:05

I'm simulating a Heat exchanger in fluent, i specified boundary condition: mass flow inlet to a fluid with temperature 633K. After iterations the result shows inlet condition to be 603K.

I am using Standard k-epsilon model

jppilot · March 31, 2016, 08:13

Hi,
are you sure your boundary conditions -> reference values are also set to your inlet conditions?

Nemish · March 31, 2016, 08:20

How do i do that?

Nemish · March 31, 2016, 08:24

Quote:

Originally Posted by jppilot

Hi,
are you sure your boundary conditions -> reference values are also set to your inlet conditions?

Where do i check if the reference values are set that way

jppilot · March 31, 2016, 08:30

workbench -> setup -> setup -> reference values

Nemish · March 31, 2016, 08:38

Is there some way it could be done in fluent, i found the reference value in reports, I have two mass flow rate boundary conditions. But there only one can be mentioned. What to do for 2 BCond

jppilot · March 31, 2016, 09:32

Maybe this tutorial can help you?

https://www.researchgate.net/file.Po...01442236752587

March 31, 2016, 08:05	The Boundary condition i specified has changed after computation	#1
Nemish New Member Nemish Join Date: Mar 2016 Posts: 5 Rep Power: 11	I'm simulating a Heat exchanger in fluent, i specified boundary condition: mass flow inlet to a fluid with temperature 633K. After iterations the result shows inlet condition to be 603K. I am using Standard k-epsilon model

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March 31, 2016, 08:13		#2
jppilot New Member Join Date: Mar 2016 Posts: 10 Rep Power: 11	Hi, are you sure your boundary conditions -> reference values are also set to your inlet conditions?

March 31, 2016, 08:20		#3
Nemish New Member Nemish Join Date: Mar 2016 Posts: 5 Rep Power: 11	How do i do that?

March 31, 2016, 08:30		#5
jppilot New Member Join Date: Mar 2016 Posts: 10 Rep Power: 11	workbench -> setup -> setup -> reference values

March 31, 2016, 08:38		#6
Nemish New Member Nemish Join Date: Mar 2016 Posts: 5 Rep Power: 11	Is there some way it could be done in fluent, i found the reference value in reports, I have two mass flow rate boundary conditions. But there only one can be mentioned. What to do for 2 BCond

March 31, 2016, 09:32		#7
jppilot New Member Join Date: Mar 2016 Posts: 10 Rep Power: 11	Maybe this tutorial can help you? https://www.researchgate.net/file.Po...01442236752587